Abrasives are hard, non-metallic, sharp edged, and irregular shaped materials used to remove small amount of materials by cutting action. It may be used in bonded form or as free particles. It is employed in grinding, polishing, super finishing, buffing, and honing operations. Commonly used abrasives are alumina (Al2O3), silicon carbide (SiC), cubic boron nitride (CBN), and diamond.
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